friction between my husband our 20 yr old daughter and me

Hi. We are all christians in our family of 5. Our middle daughter 20 and a sophmore in college made her mind up she was going to convince my husband to allow her to live off of college cammpus housing for her jr. year knowing that I did not agree. They have been discussing this for a few months, knowing I wanted her to live on campus until her senior year. My husband even agreed with me recently she isn't ready to live on her own in an apartment; however he says we will save about $1,500 by letting her live w/ roommates in this apartment next fall. I am NOT in favor at all and the apartment is where typical college kids live near the campus but "party" alot and the area isn't very safe. I just found out today that my husband went with our daughter and signed a contract for our daughter to live in the apartment for a years contract behind my back and knowing as her mother I had her very best interest at heart! I am mad and hurt at both my daughter and husband for going forward with a new plan knowing that this is not what we agreed upon when she started college as a freshman. Please tell me how I can get over being very angry and hurt at both for making such a huge life altering decision without my knowledge or approval?